HTML
On this page, the Mozilla Developer Website first gives a brief summary of the purpose and history of HTML. The parts that would be most beneficial to me are in the left sidebar which have links to other articles and the links towards the bottom of the page past the initial summary.
CSS
On this page, the Mozilla Developer Website first gives a brief summary of the purpose and history of CSS. Like the HTML page, the parts on the page that would be most beneficial to me are in the left sidebar which have links to other articles and the links towards the bottom of the page past the initial summary.
Javascript
On this page, the Mozilla Developer Website first gives a brief summary of the purpose and history of Javascript. This page will be more helpful to me probably since I'm only just beginning to learn Javascript. The parts that would be most beneficial to me are in the left sidebar which have links to other articles and the links towards the bottom of the page past the initial summary.
DOM
On the DOM page, that subject is completely new to me, so I was very interested in it's contents. Until I am more familiar with it, I definitely value that introduction summary a lot and could definitely see myself using the other links on that page for future reference later.
Summary
Any of these resources (the HTML, CSS, Javascript, or DOM pages) would be great to consult for a project at work if there is some code you're not quite sure of or if you need to review your HTML, CSS, or Javascript skills. I'm sure this will be a great resource as I continue to learn more about the DOM. It's important to use a trusted resource because there are several different ways to make things happen in the world of coding and not all the code samples on the internet may be what you're looking for. If you insert an incorrect piece of code into a website project, your page may not work properly.